توضیح 1
Nominal: account type or country.
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درس 4 از 12
Use nominal, ordinal, interval, and ratio levels to decide which comparisons and calculations are meaningful.
Theory
Nominal variables are names without rank. Ordinal variables have rank, but unequal or unknown gaps. Interval variables have meaningful equal differences but no true zero. Ratio variables have equal differences and a true zero, so ratios can be interpreted.
توضیح 1
Nominal: account type or country.
توضیح 2
Ordinal: satisfaction rank.
توضیح 3
Ratio: study hours or response time.
فعالیت تعاملی
Current level
nominal
Count categories. Measurement level helps decide which summaries are defensible.
ارتباط با R
Use ordered factors to encode rating data and summarize ordered categories carefully.
Live R Lab
Encode ordered survey ratings, summarize their distribution, and discuss when a mean is only a rough shorthand.
Ready to run
Can I average this?
Averages are strongest for interval or ratio data. For ordinal ratings, a mean can be a shorthand, but the distribution should be shown too.
دستیار
Give me a measurement-level decision tree for a variable I describe, without directly answering any active quiz question.